Caster



FIG. 1 is a front left-hand perspective view of a caster embodying my new design;

FIG. 2 is a left-hand side elevational view thereof;

FIG. 3 is a rear-elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right-hand side elevational view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a top plan view thereof. 

The ornamental design of a caster, as shown and described. 